D&D Dice Probability Calculator
Calculate exact outcome probabilities for dice expressions such as 3d6+2, along with advantage or disadvantage for a d20.
What this tool does
Calculate exact outcome probabilities for dice expressions such as 3d6+2, along with advantage or disadvantage for a d20.
Where this tool is useful
See the full discrete distribution, expected value, and chance of meeting a target.
Example or format details
See the full discrete distribution, expected value, and chance of meeting a target.
How to use D&D Dice Probability Calculator
- 1
Enter the game-specific values or notation in the labeled fields.
- 2
Adjust the fields and options, then select Run tool.
- 3
Inspect the actual result. Copy the text or download the generated file when appropriate.
Privacy and processing
Entered content and chosen files are processed locally in your browser. No conversion request is sent to a freedropper server.
Common questions
What can I use this for?
See the full discrete distribution, expected value, and chance of meeting a target.
What does the tool accept?
Enter the game-specific values or notation in the labeled fields.
What should I check before using the output?
Check the accepted input, output format and settings before reusing the result. See the full discrete distribution, expected value, and chance of meeting a target.
Does my input leave my device?
The utility runs in your browser. Selected content is not transmitted to a freedropper conversion service.
How can I reuse the result?
Copy the output or use the download control when the tool produces a file. Check the target application accepts the resulting syntax or file type.